diff --git a/build/service/CalendarExtractor.php b/build/service/CalendarExtractor.php
index 41eeed1..81e7b0d 100644
--- a/build/service/CalendarExtractor.php
+++ b/build/service/CalendarExtractor.php
@@ -289,9 +289,10 @@
 					$RAW .= "DTSTAMP:".gmdate("Ymd\THis\Z", time())."\n"; // required
 					$RAW .= "DTSTART:${start_t}\n";
 					$RAW .= "DTEND:${stop_t}\n";
-					$RAW .= "UID:$start_t@xdrm.io\n";     // required
+					$RAW .= "UID:$start_t-univ-pau-ics\n";     // required
 					$RAW .= "SUMMARY:$type\n";
-					$RAW .= "END:VEVENT\n\n";
+					$RAW .= "CATEGORIES: UPPA Calendar\n";
+					$RAW .= "END:VEVENT\n";
 				}
 
 			}
diff --git a/build/service/Updater.php b/build/service/Updater.php
index 9323f45..9712abf 100644
--- a/build/service/Updater.php
+++ b/build/service/Updater.php
@@ -43,7 +43,7 @@
 			=========================================================*/
 			foreach($this->config->getDiplomes() as $d_id=>$d_name){
 
-				file_put_contents(__ROOT__."/tmp/$d_id.ics", "BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:-//xdrn.io//NONSGML v1.0//EN\nMETHOD:PUBLISH\nX-WR-CALNAME: UPPA $d_name\n");
+				file_put_contents(__ROOT__."/tmp/$d_id.ics", "BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:-//xdrm.io//NONSGML v1.0//EN\nMETHOD:PUBLISH\nX-WR-CALNAME: UPPA $d_name\n");
 
 				/* (1) Browse each date
 				---------------------------------------------------------*/